语法:
$(":lt(index)")
参数:
● index:选中的索引号。选择小于指定索引号的元素。
示例:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("tr:lt(4)").css("background-color", "yellow"); $("th:lt(2)").css("color", "cornflowerblue"); }); </script> </head> <body> <h1>商品介绍</h1> <table border="1"> <tr> <th>序号</th> <th>商品</th> <th>价格</th> </tr> <tr> <td>1</td> <td>T恤</td> <td>¥40.00</td> </tr> <tr> <td>2</td> <td>红T恤</td> <td>¥45.00</td> </tr> <tr> <td>3</td> <td>夹克衫</td> <td>¥100.00</td> </tr> <tr> <td>4</td> <td>牛仔褂</td> <td>¥90.00</td> </tr> <tr> <td>5</td> <td>裙子</td> <td>¥120.00</td> </tr> <tr> <td>6</td> <td>帽子</td> <td>¥30.00</td> </tr> <tr> <td>7</td> <td>休闲裤</td> <td>¥50.00</td> </tr> <tr> <td>8</td> <td>短裤</td> <td>¥30.00</td> </tr> </table> </body> </html>
效果图:
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